Pencil



March 24, 1931- I L. E. SITZLER 1,798,003

PENCIL Original Filed Sept. 16, 1927 Patented Mar. 24, 1931 I UNETED PATENT QFFEE LEWIS ERNEST SITZLER, F LINKWOOD, ENGLAND PENCIL Application filed September 16, 1927, Serial No. 220,032, and in Great Britain September 21, 1926. Renewed February 4, 1931.

This invention relates to improvements in the outer case and a preformed tubular writing or marking pencils in which the sheath E of textile fabric similar to the matemarking substance such as graphite or so riallargely used for tubular boot laces, corcalled black lead is encased in wood or set laces, etc., the material being drawn on some other material which can be cut away loosely over the headA and made tight there- :55 to expose for use a portion of the marking on by pulling the ends. The sheathed lead substance, hereinafter for convenience called is then enclosed between the two halves of the lead. In this sharpening process the the outer case B the grooved surfaces of lead commonly breaks not only at the place which are coated with adhesive in the usual where it projects from the case but often actumanner. an

ally within the case, causing considerable To secure the lead more firmly in the case wastage. Occasionally, also, breakage of the the sheathed lead may be clipped in the adlead within the case occurs if the pencil is hesive before being placed between the halves dropped or subjected to a blow. An object of of the case.

vhe present invention is to obviate these de- Where pencils are made with a complete 65 fects and to strengthen the construct1on tubular wooden or other case,prov1ded with generally. a central bore, and the marking substance,

According to the present invention, the lead either in the form of a stick or a plastic mass, is provided with a covering or sheath of teX- is forced into the case, the sheath in accordtile fabric or other similar or suitable material ance with the present invention may first be (0 treated by an adhesive which Sets ha to fitted within the case and fixed by an adhesive form a rigid or stifi support for the lead interand the marking substance then forced into posed between the latter and the case. Such position. The bore of the case, whether the a sheath is readily cut away with the case to latter be made as a complete tube or in two expose the lead while at the same time it prohalves, may be corrugated 0r roughened the tects the latter during sharpening, writing more readily to hold the glue and the sheath and against external blows, and supports in position. and retains the lead even should it fracture. It will readily be appreciated that a pen- Freferably the sheath is formed of textile cil constructed in accordance with my present 30 fabric such as cotton or linen, which may if invention will be much less liable to breakage desired be of relatively coarse texture or looseof the lead whether during sharpening or due ly woven so as the more readily to absorb the to external blows. adhesive and retain a suitable quantity of it What I claim is 7 when considerable pressure is applied to the In a marking pencil in which the marking 35 two halves of the case. substance is enclosed in an outer case capable In order that the method of applying such of being cut away to expose a portion of the a sheath to the lead of a pc -cil may be more marking substance, the provision of a prefully understood, a pencil constructed in 210- formed tubular sheath of textile fabric drawn cordance with my present invention is illuson over the marking substance and impreg- 40 trated in and described with reference to the ated with a hard setting adhesive to form accompanying drawings in which a stiff support for the marking substance Fig. 1 illustrates the method of sheathing interposed between the latter and the outer the lead or marking substance. case.

Fig. 2 shows the lead so sheathed on one LEWIS ERNEST SITZLER. half of the outer case, and

Fig. 3 is a cross section of the completed pencil.

Referring to Figs. 1, 2 and 3 The pencil comprises a lead or rod of markto ing substance A, two grooved halves B of 10c 

